Poida I have seen the same on the V3_1 board I have. I have plans to look at it later, now I'm busy trying to make my first S905 build boot.
It turns out that this is quite a major issue. Your attention to it would be greatly appreciated. Even assigning the devices different static addresses results in me not being able to use both boxes simultaneously.
Is there maybe a script I can run, to change / spoof the MAC address of one of the boxes?
I also begin to wonder if the problem is confined to v3_1 boards. Can anyone confirm that they have purchased multiple boxes of the same motherboard version and have different MAC addresses assigned to each, with these builds?
Incidentally, the Wifi cards are not recognised with these boards (doesn't bother me, but was one of my attempts to get a unique MAC address)